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This file assesses the most important developments within the background of jet bomber layout and improvement within the usa considering international warfare II to judge the position of previous bomber and comparable study and devel¬opment (RD) adventure between major contractors. It builds on previous RAND examine suggested in Drezner et al.

The Air Force rejected both companies' proposals in early 1957, telling them to go back to the drawing board. North American then discovered a paper written by NACA aerodynamicists in early 1956 explaining their discovery of "compression lift," an aerodynamic phenomenon that was postulated to dramatically increase lift-to-drag ratios at high supersonic speeds. North American completely reworked its design 12Actually, the requirement originally asked for supersonic dash over the final 1,000 miles to the target.

Indeed, by the time Convair won the supersonic bomber competition, its B-58 design proposal had evolved into a scaled-up and refined version of the F- 102. The original B-58 design was substantially modified in accordance with the "area rule" concept discovered during the F-102 program in 1952. In another example, the leading edge of the B-58 wing was redesigned before first flight to incorporate the "conical camber" design concept also developed on the F-102 program. (See Miller, 1985, pp. 25-26; Johnson, 1960, pp.

Air Force tactical attack bomber. A month later, Martin received a contract to modify and produce the British aircraft as the B-57. In June 1952, the Air Force ordered procurement as a medium tactical bomber of a slightly modified version of the Navy A3D Skywarrior nuclear bomber developed by Douglas. The resulting Air Force B-66 Destroyer was so heavily modified, however, that it virtually amounted to a new aircraft. 8 For an in-depth discussion of the development of these fighters, see Johnson 11960).